summaryrefslogtreecommitdiffstats
path: root/arch/sparc/kernel/ioport.c
blob: 1eb6043896555a816c2b5294a697dc187a8f6032 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
/*
 * ioport.c:  Simple io mapping allocator.
 *
 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
 * Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
 *
 * 1996: sparc_free_io, 1999: ioremap()/iounmap() by Pete Zaitcev.
 *
 * 2000/01/29
 * <rth> zait: as long as pci_alloc_consistent produces something addressable, 
 *	things are ok.
 * <zaitcev> rth: no, it is relevant, because get_free_pages returns you a
 *	pointer into the big page mapping
 * <rth> zait: so what?
 * <rth> zait: remap_it_my_way(virt_to_phys(get_free_page()))
 * <zaitcev> Hmm
 * <zaitcev> Suppose I did this remap_it_my_way(virt_to_phys(get_free_page())).
 *	So far so good.
 * <zaitcev> Now, driver calls pci_free_consistent(with result of
 *	remap_it_my_way()).
 * <zaitcev> How do you find the address to pass to free_pages()?
 * <rth> zait: walk the page tables?  It's only two or three level after all.
 * <rth> zait: you have to walk them anyway to remove the mapping.
 * <zaitcev> Hmm
 * <zaitcev> Sounds reasonable
 */

#include <linux/module.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/pci.h>		/* struct pci_dev */
#include <linux/proc_fs.h>
#include <linux/scatterlist.h>
#include <linux/of_device.h>

#include <asm/io.h>
#include <asm/vaddrs.h>
#include <asm/oplib.h>
#include <asm/prom.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
#include <asm/dma.h>
#include <asm/iommu.h>
#include <asm/io-unit.h>

#define mmu_inval_dma_area(p, l)	/* Anton pulled it out for 2.4.0-xx */

static struct resource *_sparc_find_resource(struct resource *r,
					     unsigned long);

static void __iomem *_sparc_ioremap(struct resource *res, u32 bus, u32 pa, int sz);
static void __iomem *_sparc_alloc_io(unsigned int busno, unsigned long phys,
    unsigned long size, char *name);
static void _sparc_free_io(struct resource *res);

static void register_proc_sparc_ioport(void);

/* This points to the next to use virtual memory for DVMA mappings */
static struct resource _sparc_dvma = {
	.name = "sparc_dvma", .start = DVMA_VADDR, .end = DVMA_END - 1
};
/* This points to the start of I/O mappings, cluable from outside. */
/*ext*/ struct resource sparc_iomap = {
	.name = "sparc_iomap", .start = IOBASE_VADDR, .end = IOBASE_END - 1
};

/*
 * Our mini-allocator...
 * Boy this is gross! We need it because we must map I/O for
 * timers and interrupt controller before the kmalloc is available.
 */

#define XNMLN  15
#define XNRES  10	/* SS-10 uses 8 */

struct xresource {
	struct resource xres;	/* Must be first */
	int xflag;		/* 1 == used */
	char xname[XNMLN+1];
};

static struct xresource xresv[XNRES];

static struct xresource *xres_alloc(void) {
	struct xresource *xrp;
	int n;

	xrp = xresv;
	for (n = 0; n < XNRES; n++) {
		if (xrp->xflag == 0) {
			xrp->xflag = 1;
			return xrp;
		}
		xrp++;
	}
	return NULL;
}

static void xres_free(struct xresource *xrp) {
	xrp->xflag = 0;
}

/*
 * These are typically used in PCI drivers
 * which are trying to be cross-platform.
 *
 * Bus type is always zero on IIep.
 */
void __iomem *ioremap(unsigned long offset, unsigned long size)
{
	char name[14];

	sprintf(name, "phys_%08x", (u32)offset);
	return _sparc_alloc_io(0, offset, size, name);
}
EXPORT_SYMBOL(ioremap);

/*
 * Comlimentary to ioremap().
 */
void iounmap(volatile void __iomem *virtual)
{
	unsigned long vaddr = (unsigned long) virtual & PAGE_MASK;
	struct resource *res;

	if ((res = _sparc_find_resource(&sparc_iomap, vaddr)) == NULL) {
		printk("free_io/iounmap: cannot free %lx\n", vaddr);
		return;
	}
	_sparc_free_io(res);

	if ((char *)res >= (char*)xresv && (char *)res < (char *)&xresv[XNRES]) {
		xres_free((struct xresource *)res);
	} else {
		kfree(res);
	}
}
EXPORT_SYMBOL(iounmap);

void __iomem *of_ioremap(struct resource *res, unsigned long offset,
			 unsigned long size, char *name)
{
	return _sparc_alloc_io(res->flags & 0xF,
			       res->start + offset,
			       size, name);
}
EXPORT_SYMBOL(of_ioremap);

void of_iounmap(struct resource *res, void __iomem *base, unsigned long size)
{
	iounmap(base);
}
EXPORT_SYMBOL(of_iounmap);

/*
 * Meat of mapping
 */
static void __iomem *_sparc_alloc_io(unsigned int busno, unsigned long phys,
    unsigned long size, char *name)
{
	static int printed_full;
	struct xresource *xres;
	struct resource *res;
	char *tack;
	int tlen;
	void __iomem *va;	/* P3 diag */

	if (name == NULL) name = "???";

	if ((xres = xres_alloc()) != 0) {
		tack = xres->xname;
		res = &xres->xres;
	} else {
		if (!printed_full) {
			printk("ioremap: done with statics, switching to malloc\n");
			printed_full = 1;
		}
		tlen = strlen(name);
		tack = kmalloc(sizeof (struct resource) + tlen + 1, GFP_KERNEL);
		if (tack == NULL) return NULL;
		memset(tack, 0, sizeof(struct resource));
		res = (struct resource *) tack;
		tack += sizeof (struct resource);
	}

	strlcpy(tack, name, XNMLN+1);
	res->name = tack;

	va = _sparc_ioremap(res, busno, phys, size);
	/* printk("ioremap(0x%x:%08lx[0x%lx])=%p\n", busno, phys, size, va); */ /* P3 diag */
	return va;
}

/*
 */
static void __iomem *
_sparc_ioremap(struct resource *res, u32 bus, u32 pa, int sz)
{
	unsigned long offset = ((unsigned long) pa) & (~PAGE_MASK);

	if (allocate_resource(&sparc_iomap, res,
	    (offset + sz + PAGE_SIZE-1) & PAGE_MASK,
	    sparc_iomap.start, sparc_iomap.end, PAGE_SIZE, NULL, NULL) != 0) {
		/* Usually we cannot see printks in this case. */
		prom_printf("alloc_io_res(%s): cannot occupy\n",
		    (res->name != NULL)? res->name: "???");
		prom_halt();
	}

	pa &= PAGE_MASK;
	sparc_mapiorange(bus, pa, res->start, res->end - res->start + 1);

	return (void __iomem *)(unsigned long)(res->start + offset);
}

/*
 * Comlimentary to _sparc_ioremap().
 */
static void _sparc_free_io(struct resource *res)
{
	unsigned long plen;

	plen = res->end - res->start + 1;
	BUG_ON((plen & (PAGE_SIZE-1)) != 0);
	sparc_unmapiorange(res->start, plen);
	release_resource(res);
}

#ifdef CONFIG_SBUS

void sbus_set_sbus64(struct device *dev, int x)
{
	printk("sbus_set_sbus64: unsupported\n");
}
EXPORT_SYMBOL(sbus_set_sbus64);

/*
 * Allocate a chunk of memory suitable for DMA.
 * Typically devices use them for control blocks.
 * CPU may access them without any explicit flushing.
 */
static void *sbus_alloc_coherent(struct device *dev, size_t len,
				 dma_addr_t *dma_addrp, gfp_t gfp)
{
	struct of_device *op = to_of_device(dev);
	unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK;
	unsigned long va;
	struct resource *res;
	int order;

	/* XXX why are some lengths signed, others unsigned? */
	if (len <= 0) {
		return NULL;
	}
	/* XXX So what is maxphys for us and how do drivers know it? */
	if (len > 256*1024) {			/* __get_free_pages() limit */
		return NULL;
	}

	order = get_order(len_total);
	if ((va = __get_free_pages(GFP_KERNEL|__GFP_COMP, order)) == 0)
		goto err_nopages;

	if ((res = kzalloc(sizeof(struct resource), GFP_KERNEL)) == NULL)
		goto err_nomem;

	if (allocate_resource(&_sparc_dvma, res, len_total,
	    _sparc_dvma.start, _sparc_dvma.end, PAGE_SIZE, NULL, NULL) != 0) {
		printk("sbus_alloc_consistent: cannot occupy 0x%lx", len_total);
		goto err_nova;
	}
	mmu_inval_dma_area(va, len_total);
	// XXX The mmu_map_dma_area does this for us below, see comments.
	// sparc_mapiorange(0, virt_to_phys(va), res->start, len_total);
	/*
	 * XXX That's where sdev would be used. Currently we load
	 * all iommu tables with the same translations.
	 */
	if (mmu_map_dma_area(dev, dma_addrp, va, res->start, len_total) != 0)
		goto err_noiommu;

	res->name = op->node->name;

	return (void *)(unsigned long)res->start;

err_noiommu:
	release_resource(res);
err_nova:
	free_pages(va, order);
err_nomem:
	kfree(res);
err_nopages:
	return NULL;
}

static void sbus_free_coherent(struct device *dev, size_t n, void *p,
			       dma_addr_t ba)
{
	struct resource *res;
	struct page *pgv;

	if ((res = _sparc_find_resource(&_sparc_dvma,
	    (unsigned long)p)) == NULL) {
		printk("sbus_free_consistent: cannot free %p\n", p);
		return;
	}

	if (((unsigned long)p & (PAGE_SIZE-1)) != 0) {
		printk("sbus_free_consistent: unaligned va %p\n", p);
		return;
	}

	n = (n + PAGE_SIZE-1) & PAGE_MASK;
	if ((res->end-res->start)+1 != n) {
		printk("sbus_free_consistent: region 0x%lx asked 0x%zx\n",
		    (long)((res->end-res->start)+1), n);
		return;
	}

	release_resource(res);
	kfree(res);

	/* mmu_inval_dma_area(va, n); */ /* it's consistent, isn't it */
	pgv = virt_to_page(p);
	mmu_unmap_dma_area(dev, ba, n);

	__free_pages(pgv, get_order(n));
}

/*
 * Map a chunk of memory so that devices can see it.
 * CPU view of this memory may be inconsistent with
 * a device view and explicit flushing is necessary.
 */
static dma_addr_t sbus_map_page(struct device *dev, struct page *page,
				unsigned long offset, size_t len,
				enum dma_data_direction dir,
				struct dma_attrs *attrs)
{
	void *va = page_address(page) + offset;

	/* XXX why are some lengths signed, others unsigned? */
	if (len <= 0) {
		return 0;
	}
	/* XXX So what is maxphys for us and how do drivers know it? */
	if (len > 256*1024) {			/* __get_free_pages() limit */
		return 0;
	}
	return mmu_get_scsi_one(dev, va, len);
}

static void sbus_unmap_page(struct device *dev, dma_addr_t ba, size_t n,
			    enum dma_data_direction dir, struct dma_attrs *attrs)
{
	mmu_release_scsi_one(dev, ba, n);
}

static int sbus_map_sg(struct device *dev, struct scatterlist *sg, int n,
		       enum dma_data_direction dir, struct dma_attrs *attrs)
{
	mmu_get_scsi_sgl(dev, sg, n);

	/*
	 * XXX sparc64 can return a partial length here. sun4c should do this
	 * but it currently panics if it can't fulfill the request - Anton
	 */
	return n;
}

static void sbus_unmap_sg(struct device *dev, struct scatterlist *sg, int n,
			  enum dma_data_direction dir, struct dma_attrs *attrs)
{
	mmu_release_scsi_sgl(dev, sg, n);
}

static void sbus_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
				 int n,	enum dma_data_direction dir)
{
	BUG();
}

static void sbus_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
				    int n, enum dma_data_direction dir)
{
	BUG();
}

struct dma_map_ops sbus_dma_ops = {
	.alloc_coherent		= sbus_alloc_coherent,
	.free_coherent		= sbus_free_coherent,
	.map_page		= sbus_map_page,
	.unmap_page		= sbus_unmap_page,
	.map_sg			= sbus_map_sg,
	.unmap_sg		= sbus_unmap_sg,
	.sync_sg_for_cpu	= sbus_sync_sg_for_cpu,
	.sync_sg_for_device	= sbus_sync_sg_for_device,
};

struct dma_map_ops *dma_ops = &sbus_dma_ops;
EXPORT_SYMBOL(dma_ops);

static int __init sparc_register_ioport(void)
{
	register_proc_sparc_ioport();

	return 0;
}

arch_initcall(sparc_register_ioport);

#endif /* CONFIG_SBUS */

#ifdef CONFIG_PCI

/* Allocate and map kernel buffer using consistent mode DMA for a device.
 * hwdev should be valid struct pci_dev pointer for PCI devices.
 */
static void *pci32_alloc_coherent(struct device *dev, size_t len,
				  dma_addr_t *pba, gfp_t gfp)
{
	unsigned long len_total = (len + PAGE_SIZE-1) & PAGE_MASK;
	unsigned long va;
	struct resource *res;
	int order;

	if (len == 0) {
		return NULL;
	}
	if (len > 256*1024) {			/* __get_free_pages() limit */
		return NULL;
	}

	order = get_order(len_total);
	va = __get_free_pages(GFP_KERNEL, order);
	if (va == 0) {
		printk("pci_alloc_consistent: no %ld pages\n", len_total>>PAGE_SHIFT);
		return NULL;
	}

	if ((res = kzalloc(sizeof(struct resource), GFP_KERNEL)) == NULL) {
		free_pages(va, order);
		printk("pci_alloc_consistent: no core\n");
		return NULL;
	}

	if (allocate_resource(&_sparc_dvma, res, len_total,
	    _sparc_dvma.start, _sparc_dvma.end, PAGE_SIZE, NULL, NULL) != 0) {
		printk("pci_alloc_consistent: cannot occupy 0x%lx", len_total);
		free_pages(va, order);
		kfree(res);
		return NULL;
	}
	mmu_inval_dma_area(va, len_total);
#if 0
/* P3 */ printk("pci_alloc_consistent: kva %lx uncva %lx phys %lx size %lx\n",
  (long)va, (long)res->start, (long)virt_to_phys(va), len_total);
#endif
	sparc_mapiorange(0, virt_to_phys(va), res->start, len_total);

	*pba = virt_to_phys(va); /* equals virt_to_bus (R.I.P.) for us. */
	return (void *) res->start;
}

/* Free and unmap a consistent DMA buffer.
 * cpu_addr is what was returned from pci_alloc_consistent,
 * size must be the same as what as passed into pci_alloc_consistent,
 * and likewise dma_addr must be the same as what *dma_addrp was set to.
 *
 * References to the memory and mappings associated with cpu_addr/dma_addr
 * past this call are illegal.
 */
static void pci32_free_coherent(struct device *dev, size_t n, void *p,
				dma_addr_t ba)
{
	struct resource *res;
	unsigned long pgp;

	if ((res = _sparc_find_resource(&_sparc_dvma,
	    (unsigned long)p)) == NULL) {
		printk("pci_free_consistent: cannot free %p\n", p);
		return;
	}

	if (((unsigned long)p & (PAGE_SIZE-1)) != 0) {
		printk("pci_free_consistent: unaligned va %p\n", p);
		return;
	}

	n = (n + PAGE_SIZE-1) & PAGE_MASK;
	if ((res->end-res->start)+1 != n) {
		printk("pci_free_consistent: region 0x%lx asked 0x%lx\n",
		    (long)((res->end-res->start)+1), (long)n);
		return;
	}

	pgp = (unsigned long) phys_to_virt(ba);	/* bus_to_virt actually */
	mmu_inval_dma_area(pgp, n);
	sparc_unmapiorange((unsigned long)p, n);

	release_resource(res);
	kfree(res);

	free_pages(pgp, get_order(n));
}

/*
 * Same as pci_map_single, but with pages.
 */
static dma_addr_t pci32_map_page(struct device *dev, struct page *page,
				 unsigned long offset, size_t size,
				 enum dma_data_direction dir,
				 struct dma_attrs *attrs)
{
	/* IIep is write-through, not flushing. */
	return page_to_phys(page) + offset;
}

/* Map a set of buffers described by scatterlist in streaming
 * mode for DMA.  This is the scather-gather version of the
 * above pci_map_single interface.  Here the scatter gather list
 * elements are each tagged with the appropriate dma address
 * and length.  They are obtained via sg_dma_{address,length}(SG).
 *
 * NOTE: An implementation may be able to use a smaller number of
 *       DMA address/length pairs than there are SG table elements.
 *       (for example via virtual mapping capabilities)
 *       The routine returns the number of addr/length pairs actually
 *       used, at most nents.
 *
 * Device ownership issues as mentioned above for pci_map_single are
 * the same here.
 */
static int pci32_map_sg(struct device *device, struct scatterlist *sgl,
			int nents, enum dma_data_direction dir,
			struct dma_attrs *attrs)
{
	struct scatterlist *sg;
	int n;

	/* IIep is write-through, not flushing. */
	for_each_sg(sgl, sg, nents, n) {
		BUG_ON(page_address(sg_page(sg)) == NULL);
		sg->dma_address = virt_to_phys(sg_virt(sg));
		sg->dma_length = sg->length;
	}
	return nents;
}

/* Unmap a set of streaming mode DMA translations.
 * Again, cpu read rules concerning calls here are the same as for
 * pci_unmap_single() above.
 */
static void pci32_unmap_sg(struct device *dev, struct scatterlist *sgl,
			   int nents, enum dma_data_direction dir,
			   struct dma_attrs *attrs)
{
	struct scatterlist *sg;
	int n;

	if (dir != PCI_DMA_TODEVICE) {
		for_each_sg(sgl, sg, nents, n) {
			BUG_ON(page_address(sg_page(sg)) == NULL);
			mmu_inval_dma_area(
			    (unsigned long) page_address(sg_page(sg)),
			    (sg->length + PAGE_SIZE-1) & PAGE_MASK);
		}
	}
}

/* Make physical memory consistent for a single
 * streaming mode DMA translation before or after a transfer.
 *
 * If you perform a pci_map_single() but wish to interrogate the
 * buffer using the cpu, yet do not wish to teardown the PCI dma
 * mapping, you must call this function before doing so.  At the
 * next point you give the PCI dma address back to the card, you
 * must first perform a pci_dma_sync_for_device, and then the
 * device again owns the buffer.
 */
static void pci32_sync_single_for_cpu(struct device *dev, dma_addr_t ba,
				      size_t size, enum dma_data_direction dir)
{
	if (dir != PCI_DMA_TODEVICE) {
		mmu_inval_dma_area((unsigned long)phys_to_virt(ba),
		    (size + PAGE_SIZE-1) & PAGE_MASK);
	}
}

static void pci32_sync_single_for_device(struct device *dev, dma_addr_t ba,
					 size_t size, enum dma_data_direction dir)
{
	if (dir != PCI_DMA_TODEVICE) {
		mmu_inval_dma_area((unsigned long)phys_to_virt(ba),
		    (size + PAGE_SIZE-1) & PAGE_MASK);
	}
}

/* Make physical memory consistent for a set of streaming
 * mode DMA translations after a transfer.
 *
 * The same as pci_dma_sync_single_* but for a scatter-gather list,
 * same rules and usage.
 */
static void pci32_sync_sg_for_cpu(struct device *dev, struct scatterlist *sgl,
				  int nents, enum dma_data_direction dir)
{
	struct scatterlist *sg;
	int n;

	if (dir != PCI_DMA_TODEVICE) {
		for_each_sg(sgl, sg, nents, n) {
			BUG_ON(page_address(sg_page(sg)) == NULL);
			mmu_inval_dma_area(
			    (unsigned long) page_address(sg_page(sg)),
			    (sg->length + PAGE_SIZE-1) & PAGE_MASK);
		}
	}
}

static void pci32_sync_sg_for_device(struct device *device, struct scatterlist *sgl,
				     int nents, enum dma_data_direction dir)
{
	struct scatterlist *sg;
	int n;

	if (dir != PCI_DMA_TODEVICE) {
		for_each_sg(sgl, sg, nents, n) {
			BUG_ON(page_address(sg_page(sg)) == NULL);
			mmu_inval_dma_area(
			    (unsigned long) page_address(sg_page(sg)),
			    (sg->length + PAGE_SIZE-1) & PAGE_MASK);
		}
	}
}

struct dma_map_ops pci32_dma_ops = {
	.alloc_coherent		= pci32_alloc_coherent,
	.free_coherent		= pci32_free_coherent,
	.map_page		= pci32_map_page,
	.map_sg			= pci32_map_sg,
	.unmap_sg		= pci32_unmap_sg,
	.sync_single_for_cpu	= pci32_sync_single_for_cpu,
	.sync_single_for_device	= pci32_sync_single_for_device,
	.sync_sg_for_cpu	= pci32_sync_sg_for_cpu,
	.sync_sg_for_device	= pci32_sync_sg_for_device,
};
EXPORT_SYMBOL(pci32_dma_ops);

#endif /* CONFIG_PCI */

#ifdef CONFIG_PROC_FS

static int
_sparc_io_get_info(char *buf, char **start, off_t fpos, int length, int *eof,
    void *data)
{
	char *p = buf, *e = buf + length;
	struct resource *r;
	const char *nm;

	for (r = ((struct resource *)data)->child; r != NULL; r = r->sibling) {
		if (p + 32 >= e)	/* Better than nothing */
			break;
		if ((nm = r->name) == 0) nm = "???";
		p += sprintf(p, "%016llx-%016llx: %s\n",
				(unsigned long long)r->start,
				(unsigned long long)r->end, nm);
	}

	return p-buf;
}

#endif /* CONFIG_PROC_FS */

/*
 * This is a version of find_resource and it belongs to kernel/resource.c.
 * Until we have agreement with Linus and Martin, it lingers here.
 *
 * XXX Too slow. Can have 8192 DVMA pages on sun4m in the worst case.
 * This probably warrants some sort of hashing.
 */
static struct resource *_sparc_find_resource(struct resource *root,
					     unsigned long hit)
{
        struct resource *tmp;

	for (tmp = root->child; tmp != 0; tmp = tmp->sibling) {
		if (tmp->start <= hit && tmp->end >= hit)
			return tmp;
	}
	return NULL;
}

static void register_proc_sparc_ioport(void)
{
#ifdef CONFIG_PROC_FS
	create_proc_read_entry("io_map",0,NULL,_sparc_io_get_info,&sparc_iomap);
	create_proc_read_entry("dvma_map",0,NULL,_sparc_io_get_info,&_sparc_dvma);
#endif
}